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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '31c908380e9518be7451d0f739b25efc9f1178172b9ebfaddc971ef093ed8e13' 
  AND token = 'pwWYKpfJxsTRXLxDZN7og4umjd0n1TojcLLPhR9qkxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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