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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d067d341357a0567ebf470165629f05550ec540483e3e36e243a1df3ddf0ee7' 
  AND token = '40tZ9jW3kAUpuXeHITdsPrUeA7X2IJJgxY5WFQPBZG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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