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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05aff883b4cfecd85e13dd1a51c407560ad6ba30d51ea4b7407d2faaaae32b19' 
  AND token = 'FbvlRvR7FGGSrpePkGWFzM0D8m1M0sULkp6K550usuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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