Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '302a3111026d60eacadd51ddae526914370ab3827479894d2f6121a687f23818' 
  AND token = '/W9FnChsVhL6h7D1Dz+GtXPfWYMLo4c4NxB96j8sAwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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