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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c0fa3311a17116487c497983203ea5cf7293c090fd59298f35bd33ebe5763a4' 
  AND token = 'HngCEmzq3TtpSe8iPjL3ePf7XNDKwm2S98UnRJb3Dgc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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