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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd06655dd60759dcb5bcb75d1d759492a47d2d57b877cfdc0a4d1d26d78df422e' 
  AND token = 'TDzaG/yKfcHh88GYa22b07vT7+7feQxW6QQE8AC5zfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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