Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ae14d55cfb2be8efcca15119f38ea97611f1441ccaa0f2c81aeb59e9d0aba87' 
  AND token = 'w10+Jm7Zd3twIa5AF8IBWAo9lDV+BlowmgDBRJdcN/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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