Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '763ae29b622a85ce47e67059529120d6a858ca7c5584b97fd964e00fc3bc477b' 
  AND token = 'AxWUIbfoOHcSbTTIFmhan/CkipR672m0UpQcnv7hVI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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