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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'feae5581303e5bec17e18ce67d242e3a79ae7df455d4cd603116adf0453bb30a' 
  AND token = 'sdyLM/Q7o2XAkdAA2m5404DeIq3F5yNzBhGxx2BIKTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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