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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '805a16f8f7acf35d671c7cf91d512a588b9434977811f35309b083d2b1619197' 
  AND token = '81YUMckyYoDVPo67GySWKSaEZkHsJXoryQR9HrSpz34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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