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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e14784d3cafef7ee1e95f46d10ebe7498e47a39605ea5679b83b5e3430ac7dd5' 
  AND token = '7oyLsMqV3By2ygPwGBeH6jd72Hki7ACofXlNFY+6/SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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