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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '133a4162f63e1933a83afbb6e4520d992a314e4e8f03a99ec3bd5a7c540c4b99' 
  AND token = 'AFWTgsI9wpjK0h7eIpZLTyDS0Z2g5Gj8+6AafcXyqU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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