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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5edc07ed91c1d3b23525774e07e59ba23a4b96d6b48f214e1286e251f0460a8' 
  AND token = '6MJ4YtSO2Ff+wh5Dj6Hq64r0rsdSXEOyK6WEARfPEis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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