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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad6db5cb3075364ea2a8e3836759e08cd1f1c5dcc7523f8c6ffcf6217179e1c7' 
  AND token = 'I5EbMJjR1LwebUqPf4obdC2Q2eOkN8e06rRqAyaYpKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00111

JSON explain

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