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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65936366d95e0db63263ada7dd1e35b9516f8479927d11e5c3ca43ef53cb304b' 
  AND token = '8fBOtV5KNhjj4ORp3u0Zv6D9ozJaG6o+xIa3l/e6tt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}