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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '800cb7577a0b4999c04963b1f94f96d83ec81d43c04261eb8aa33c347821addc' 
  AND token = '0SKyDwx7u+tqGXFmrjS6m0GOf66ofDN97/B2bkk2h5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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