SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0113766b19dff531cf7110770c736a4de5a993ed43eccea84d56bd40ac44094b' 
  AND token = 'c03bRwt/VqZzjDSF84EVhS7/qD60d/+m2xdvZKfBPMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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