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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58858bf6382ad972223d691dd7fa4eac2b5ee84f9e669ad5a3f66f92a81d23de' 
  AND token = 'GdO8j4r6ip9ef3VnAwuqxcu0oGf4hIlxLj1yMGcgQjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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