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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d24b0360aa7fe8cdbb7827c89b61d176f1cafa10ccc75c9a3f3e63ee3b6a3b4' 
  AND token = 'eUECDhi9sQv5c4tNbRe+u0GhyANtdVY4qjuVP2fTFtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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