Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34a7f554c3dcf7bd10f68f5f15d948454a04779a3553ff4b547cc6b38d535263' 
  AND token = 'aja59TCxEn90HshNa+ebgpjX3NobYM3mEDrAjNyGn/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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