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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1149cb06067b5c394dff8f4b1f9a70464bb1faa28b7fae153ce6a16c7f89cbf' 
  AND token = 'uh/8wPp9lTxalmMWvDifgpY7+nOo8bo1VoOX3yVyv/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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