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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ad490a87e15915312fdc03d182e3bda07a94c16f8b7862ede111d28c37f9bdf' 
  AND token = 'xHtpTdYDZvBs/GFkjyU6aG4asmLDT0WQqwI2PNnD5rM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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