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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89eab03d7ded610d459af1e25f0ebc870b52050acf3dc61d1b18fe58573c073f' 
  AND token = 'xCeD2IFcNR23a0afbMM8Ae8WnSspfj+dyrruIqdb+Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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