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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c72cf2b331a101634b3528b1c3e7ceb1b7a0f71d5d93c4ecf0eb726b42a1610' 
  AND token = 'UCvkxQ/9svqGZFxNpMlGK9+SR/UKKPjb5t9twTrxD8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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