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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca2f3a698e9da18aaae0769fec96db008968b57d647212ecc5129bcf0b3ae060' 
  AND token = 'IVScyDSYrQaCzisrFv0vU9fvcHbjVzdUbO7ihFJ2rLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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