Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58e7407a51fd0e8610bb4d19c921aefc3ee66cb9bc515470b5c231bf5630c3e2' 
  AND token = 'wcxF2de/HKcbU+viXfeuuAUmfChZfVY8eFiwGNDXaeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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