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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05b3aa28f5ac2195d391b57b159c03e4d2bdab66df0e7f74a8787c0607ba2a73' 
  AND token = 'YX55SAcnfJ0M/zWdIPcEfut4jaYXGjWF+b3ole3sYBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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