Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c77c0e4f8e0e52314f355d91d67a53cf3cd0832f2f08456297c7dd940781d514' 
  AND token = 'iNd+zNLL+03Ei0pmeGVGWHV3SoBAXbXd6o1hy1W8fBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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