Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2719786b6c6622656abe03af05a13f68656e1c6b35415ad697f5fc7ecaa86a58' 
  AND token = 'QiwhvWbvrZSQTvyPIIzmIOVmpsemDabMHIaLDTEeR8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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