SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84677c177cd70f73ccad5679151ba29719d625ed05e70671a80b86a43dfa0b6b' 
  AND token = 'BgfifPzyjDNqB4J5LH2Zw9Px9P9mczQK/J5yQLS9hy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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