Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4e45a0aed3c395fc05f831999bf9546cc6c37485dbfe0bc5b50e38f45926cff' 
  AND token = '5jhyxafkt0e5R7rnWyHKwyzW4+khDjlXqOVeCQBMWKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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