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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54d13babb2023ff2d9bfaa22cb4fd4e553c4abbbc7929d83d6918697436f5e65' 
  AND token = 'uocoEM2cNoGiEypr0o/ZPqowAdixo64jdwEBvmch2y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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