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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1889a09c222f0e0acfa706f4bdbdfb9c5c7fdb6d111a6f73a33dd18f722cf54' 
  AND token = 'aLWBBmVd2fA19k+17gh60FDwALQsOn+x8lf3mNWWuCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00092

JSON explain

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