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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1ccad3a64fa099e4e568c2e259b2bca107362a3fd989bc1f50a0b99eb707a9f' 
  AND token = 'b30NvQYC+9qV+neB5zOTZHgitbrK380G9awbR6p+iio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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