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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13585de1c22d0fc635c8f76c24af9a88c6d57de60ad28a2076d3e0c6d2db435b' 
  AND token = 'Y/NvkyR6Tv0J0a0j25iqVqHZRYyDG3O8005ftt+KOIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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