Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdf306647ea626fa4cd0c7d3f2ebf2e6bb2025c6efc0fa04727ea925901f8f54' 
  AND token = 'zSlck0vhvJps3DK57jIXi6miBaIXGbIhjIE+B8+a6Q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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