Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba6fc42a8dc4f38b687a6ac37781ed710d72792c08b45cdab12c9006e53b7d47' 
  AND token = 'pIXUV6MjiEKdcfO+I45ar2mpnn5//OhfcxKkqkrpiPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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