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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dd8406c4fcf1f2462b0633cc02d95b1dbf1b57cac984801fd0617e557b8fe3f' 
  AND token = 'MI++sDSW3MEjbV7Rta7ep8HpVoeSIhdl7UXjhaihcaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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