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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '084612cdf7b8642510ff5b9b6a7780b08664336c46838db813491bbb3b9d4ced' 
  AND token = '6EOTHt9oy0cnx+KXhnAn13qYdsxMJ/D/OPMeczC5xlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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