SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85cb26f2cda8750fd95786cdbb3636a5e3fedc6054db539483305b593a8924cf' 
  AND token = 'o6hoZIkcV2G/Sl+7m/I3ucxjXMqY7vva7O//43MG+VY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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