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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ecb0f5b888893a33d247d8e8ec8c2cbbd869fc55f10a04321e3e52d3a3c26bf2' 
  AND token = 'Zmx4kbHQ6LsNAkt3e32IDnlyy3GiMgFLJ4KOUCvGzkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}