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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4efa1539baa44df8b7e24c3c62b5b0c69de11e8820132e7cf46f786802ab0018' 
  AND token = '16JugwetC49eVbWgCG1xyxulpIBDr7F+WnPOS6wMGSk=' 
  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"
    }
  }
}