Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '209a5907581dc1848ef4a0ebd60ecb629afe2932b6596cfdd2b31140c2dab31e' 
  AND token = 'RpqQTaTmGqnUP89+xKj1AhpAL/44cMTawOknMi3aYu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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