Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75432281cedeb212c3d3a8535cbccc2b22ac94b6c09c10b8171757ef8cd8b9aa' 
  AND token = 'SCUuvLSAxg3mElEmBOvTYE+NCnzY4UoGrQrilDFjBFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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