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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a486db1a985c01c72e496097a49f641a0dd795255b8381a3f09aa65a0e3157b' 
  AND token = 'lKDRMAY3QE2rcXfC61mrIq5r3zoRvPTYhEInV1Y5IZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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