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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d07a0095ec62ae7224bfd287688ea777d294aa9aa47d7aacdc7ca76e77226b' 
  AND token = 'XY8A7xj2fShH1kBsI6EoXMw3NlrTogFcmx+PJDhRAEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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