SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b3d249062407d791dc3a6d4f94ce73b8f4d97b07224f5968e528b96b7404afac' 
  AND token = 'mjhlPa8twDKBx4HAX2zwF+Neppxye2Cj1HUnJnHXGog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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