Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6e06435f20ab7fb033444c8085abdd77eabd790743f1df861da89fe4cdf75554' 
  AND token = '5T5R6bddyzEwxWCa0gAiFulGX3nwreUZoeSqwVdvIKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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