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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '005f613db0ea1f0a28a16474d22ef216c7b2ed1cf9187fce93744cc71ba1e615' 
  AND token = 'fn1FiRf8FCcz20K0pOI17Jq8DMQmGnWRfDjMi9tJ0KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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