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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'beed546f2086a3897c78d62f3f26ce71851f0c528cc30107c1e375985fc63c1f' 
  AND token = 's93/x5npJSNoIpCn28OMunytPXkS2ZX4jiyUyoagl1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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