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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61d40d025654d0095d04183ce147965e8c08f698a34ec21db252e9c80b81ad89' 
  AND token = '/ezttBlic1E4/bm8bqrnjNr5fzB8zDxh+o8S1bakTk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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