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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3633be27219d6f0a448bc99e574d44c60e805d6060ce693c7b6301f8a8ce93df' 
  AND token = '0mhFyBqXJ8e+5sVI8FKn+PoNB3oB97KXxd9UFrSi8EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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