Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0604f38d87f0566cfbd93fc9b24ac5070feded675f06b0d659add80f455e504' 
  AND token = 'CV963qEV+SpPwyEEMvKgRurAWN3z3/1Zwpivi6pMBQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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