Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de315d845dd051600e04e52aae88ea7c225e776e3e54fcbddfc064e67fbc5e91' 
  AND token = 'DPd1Gbk/KbyzDqWyFOFZprhxuWvzXD8nCPb6H9pdGXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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