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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64d45a195fe7999a8269cd49b06cf9b4f569c8f350d09ed542e3b495c9427516' 
  AND token = 'ixHd4qnDwgTwCmQfbGoa4zGUHj7K8muY7juQYHb5TH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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