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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1bb67065aaa9d45779d7fee0a1c49989876464bd9c5042a41edc966c44192bfc' 
  AND token = 'Joyv+ceP3GtJwChi9iPDTxjSDKpeVCh0Wi5cZ3Q29Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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