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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '469b174fb2f59e0852c414070710e98be4f14413478593c9992f733a59d096e8' 
  AND token = 'AlV7eoTv6JTZB6kVW/R7o47sEEYGR/SiB/FV8/T/LGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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