Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb0f7991d54ad9990e526706bced40483a0e3c6a464fa5a57fad545d86855ab6' 
  AND token = '18rFynyLsKKEGSTSea7OU3g5eOrYkrAgEvsfCZ1PBtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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