Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfd35077e2a617ddad845b53c6837801376666f826d627f4293a072a4a638e24' 
  AND token = 'o94T9dU3+nT+u9C0m822kWrLfSfoahNsDYLekr5CPQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}