Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '828035f5f139c1c5928cc3ed390becc9b996351d7f97c42725302b4c46eb598e' 
  AND token = 'Mqnh+FLFRwfB43s6Kk5AnieZh5hTmr9QBKq56L3HqwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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