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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cab9a3e423dff44c8367b9d55355bad0f89c0c29ed792e3c44388c662f20975' 
  AND token = 'kD2lEyoiL99yPK8zgbLu6vOD10o1mpP6pqxM9pGthLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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