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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bff6ff71fe3f46f41a3f7b4559e7c001ffd09943b731bdd2f2c0922ab4e106fd' 
  AND token = 'zntBW+aRkg6Kz1I4+Nx6oKPBkSFqYvSza3OUWJr9Tac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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