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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44aaee48cba028cf5dcb0a1043834f85c92381eade46f4af879bac3be4b23058' 
  AND token = 'hwnZ9kXNIqpeHROCLxI/3S/q3gn8AWMZX7ORL1/oP+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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